Operational modal analysis of an eleven-span concrete bridge subjected to weak ambient excitations

• Published in: Engineering structures Vol. 151; pp. 839 - 860
• Main Authors: Chen, Ge-Wei, Omenzetter, Piotr, Beskhyroun, Sherif
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 15.11.2017; Elsevier BV
• Subjects: Accelerometers; Algorithms; Ambient vibrations; Bridge decks; Bridges; Concrete bridges; Data recorders; Domain decomposition methods; Dynamic characteristics; Excitation; Feasibility studies; Finite element method; Mathematical models; Modal analysis; Modal identification; Noise; Noise levels; Operational modal analysis; Parameter identification; Ramps; Recorders; Reliability analysis; Roads & highways; Sensors; Spatial discrimination; Spatial resolution; Subspace methods; System identification; Tremors; Vibration; Vibration effects; Vibration measurement; Vibration tests; Vibrations; Weak excitation; Bridges; Modal identification; System identification; Ambient vibrations; Operational modal analysis; Weak excitation

•3D operational modal analysis of an 11-span concrete motorway off-ramp bridge with nearly 200 measurement points.•Exploration of modal identifiability limits under extremely weak ambient excitation.•Detailed comparison of several operational modal analysis methods. The challenges of accurately iden...